![Make battery pack for old speaker, HK Go Play 2. Original 8 D-batteries, 1.5V each, while wall power is 18V. Are there probably different circuits, or could I make the battery pack Make battery pack for old speaker, HK Go Play 2. Original 8 D-batteries, 1.5V each, while wall power is 18V. Are there probably different circuits, or could I make the battery pack](https://preview.redd.it/make-battery-pack-for-old-speaker-hk-go-play-2-original-8-d-v0-bsi3gvv4c1y91.jpg?width=640&crop=smart&auto=webp&s=202121d81ef2e39503dd82ace0ad9014ef0d6f6a)
Make battery pack for old speaker, HK Go Play 2. Original 8 D-batteries, 1.5V each, while wall power is 18V. Are there probably different circuits, or could I make the battery pack
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